Tupac Shakur died at 25 on Sept. 13, 1996, six days after being shot in a drive-by attack in Las Vegas. Now, 27 years later, one of the last living witnesses, Duane "Keffe D" Davis, was charged with murder with use of a deadly weapon Friday in the 1996 killing, a long-awaited breakthrough in the case.    A Nevada grand jury indicted Duane "Keffe D" Davis in the killing, prosecutors announced in court Friday. Chief Deputy District Attorney Marc DiGiacomo said a grand jury had been seated in the case for "several months." Get all the details about the legal developments at our link in bio.